HP 3336A - Page 107

Performance
Tests
Model
3336A/B/C
d. Set the electronic counter controls to measure the average time interval from input A ©
to input B (T.1.AVG AB). Set the counter to average 10’ intervals. Note, the gate time to
average
107
intervals
will
be
1
second.
Do
not
use
the
first
reading
displayed
after
changing
phase.
e. Adjust the 3336 (DUT) output phase until the counter displays a time interval from 190
ns
to
210
ns.
Each
degree
incremented
on
the
3336
will
cause
a
2.8
ns
change
in
the
counter
display.
f. Assign zero phase to the 3336 signal output. This is a shifted function of the PHASE
key.
g.
Record
the
electronic
counter
reading
with
no
phase
shift
(T1).
h.
Change
the
phase
of
the
3336
output
signal
by
one
of
these
values:
+1°
+10°
+
100°
i. Record the electronic counter reading with the test phase shift (T2).
j.
Reset
the
3336
output
phase
to
zero
degrees.
The
electronic
counter
should
again
display
a
time interval
from
190
ns
to
210
ns.
k.
Repeat
Steps
e
thru
j
until
each
phase
increment
has
been
measured.
Reading
T1
may
change
slightly
from
test
to
test
and
a
new
value
should
be
recorded
for
each
test
increment.
&
1.
Compute
the
actual
time
difference
of
each
phase
increment
by
subtracting
T1
from
T2.
Record
this
value
on
the
Performance
Test
Record
and
compare
it
to
the
upper
and
lower
limits.
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3336 -4-6
Figure
4-6.
Phase
Increment
Accuracy
Equipment
Set
Up.
4-22